Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ... MARCH 1, 1910. DRAWING N« I Fid. 64 32. Sheet 2. Divide this sheet into twelve spaces as was done with sheet 1. The sections shown in Fig. 47 are to be drawn on this sheet, the name of each section being printed beneath it as shown. In space 11, draw another cast iron section, using the 30X60 triangle, the lines making an angle of 30 deg. with the horizontal (see Fig. 7). Owing to the larger area to be sectioned, the distance between the section lines should be about three times that shown. Place the title in space 12. Finish with ink lines. As this drawing is, of course, not to scale the words omitted. 'scale: full size" should be 33. Sheet 3. Draw the bolts, etc., illustrated in Fig. 65, using the full size scale. Arrange them so that the sheet will present a neat symmetrical appearance, remembering to reserve sufficient space in the lower right hand corner for the title. The value of a for the bolt shown at the left hand side of the sheet, should be one-half that of b. Finish with ink lines. The letters a and 6, also the value (60) for the angle of the threads, should not appear on the drawing. 34. Sheet 4. Divide this sheet into ten equal parts by vertical lines and then into four equal parts by horizontal lines so as to make forty equal spaces. Reserve two spaces in the lower right hand corner for the title and draw in the others the symbols shown in Fig. 66. These symbols are a selection from those used in drawing diagrams and plans for signal work. They are employed as a standard short method of indicating different instruments, etc. No. 1 indicates a non-automatic interlocked two position home signal of the semaphore type; No. 2 an automatic two position home signal; No. 3 a distant power signal at mechanical interlocking plants (no track...
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